G1226–διαβεβαιόω–diabebaioō

and willith to be techeris of the lawe, and vndurstonden not what thingis thei speken, nether of what thingis thei affermen.

διαβεβαιοῦνται. diabebaiountai “they confidently assert.”

A trewe word is, and of these thingis Y wole that thou conferme othere, that thei that bileuen to God, be bisy to be aboue othere in good werkis. These thingis ben good, and profitable to men.

διαβεβαιοῦσθαι diabebaiousthai “to affirm strongly”